package com.pkk.components.util.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @description: Spring工具类
 * @author: peikunkun
 * @create: 2018-10-31 11:47
 **/
@Component
public class SpringUtil implements ApplicationContextAware {

  private static ApplicationContext applicationContext;

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    if (SpringUtil.applicationContext == null) {
      SpringUtil.applicationContext = applicationContext;
    }
  }

  //获取applicationContext
  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  //通过name获取 Bean.
  public static Object getBean(String name) {
    return getApplicationContext().getBean(name);
  }

  //通过class获取Bean.
  public static <T> T getBean(Class<T> clazz) {
    return getApplicationContext().getBean(clazz);
  }

  //通过name,以及Clazz返回指定的Bean
  public static <T> T getBean(String name, Class<T> clazz) {
    return getApplicationContext().getBean(name, clazz);
  }


  public static Class<? extends Object> getType(String name) {
    return applicationContext.getType(name);
  }

  public static boolean containsBean(String name) {
    return applicationContext.containsBean(name);
  }

  public static boolean isSingleton(String name) {
    return applicationContext.isSingleton(name);
  }
}
